Pusher ram for coke ovens



July 18, 1944. H. K PERS 7 2,354,030

PUSHER RAM FOR COKE OVENS Filed Jan. 6, 1941 IlllllllllIIIIIIIIIIIIIIIIIHIllllllIIlllllllllllllilllllillllllllllIIIIIIIIIIIIIIINIH Br Z 2 HTTO/P/VE) Patented July 18, 1944 UNITED zomc I Heinrich,Koppers, Essen, Germany;-.vestcd in theAlien- Brope'rty Custodian 1 Application January 6, 1941, Serial No. 373,295

. In Germany-December 1339 v The present invention relates to devices forthe removal of the cokecake from the'coki-ng chambers or retorts of horizontal chamber-or retort-ovens for the production of-gas andcoke; and more particularly to devices for the purpose set forth above which comprise a pusher ram which is connected 'with'means for effectingYa reciprocating movement thereof. a

It iscommon usage to equip a horizontalcliame ber oven battery with a pusher ram for pushing the incandescent coke cakes out'of theoven chambers,' said pusher ram comprising a pusher head or shield which is supported by an essentially horizontal pusher bar or rod. The dimeni-j sions of the pusher headare a little bitsmaller than those of the oven chambers so that the pusher head may be easily movedto and fro inside the chambers. When the carbonization' of the coal charge in the chamber is finished, the doors at both sides of the chamber are'opene'd and the'pusher ram is introduced into the chamber from one side. The coke cake formed in the chamber isjthereby pushed out at the other side ofthe chamber. In so pushingthe chambers,

the pusher ram moves forwardly throughth'ei whole chamber to .be emptied and is then drawn back through the same, after the chamber is completely discharged, to remove the pusher head from the chamber.

During the pushing procedure, the pusher ram or rod is exposed to the high temperature of the coking chamber, the walls of which mostly have a temperature exceeding 1000 C. When the pusher ram is drawn back out of the chamber after the discharge is completed, it cools down rather quickly. This frequent heating up and cooling down of the pusher ram has a detrimental effect on its metal body.

The main object of my invention, therefore, is to provide such improvements in the pusher rams as will protect the rod against the influence of the high temperatures in the coking chambers and increase its stability to a considerable extent.

It is usual to design the pusher ram of coke ovens in the form of an I-beam having a central web portion and two flanges, the central web of which extends vertically. This design, I too principally adopted for my invention.

For the reciprocating movement of the pusher ram, there is generally applied a spur rack fitted to the pusher rod and a pinion connected with a suitable drive is geared to this spur rack. When the pinion turns in one direction, the

CAD

pusher ram is moved into the chamber, and the I the pinion 6.

spur'rack for-the pinion at one side of the vertically disposed central web and to fit protection plates, preferably consisting of thick-walled cast iron plates,to the other side of the central web. By thisarrangement, the'relativelythin central Webof,the pusher ram, which was susceptible to radiation, is protected againstvthe disadvant'a'geou'sl heat radiation of the highly heated chamberw'alls in a very simple though effective manner. I

Preferably, I- use an I-beam, the central web of which is of less height than the width of the flanges which extend crosswise of the web.

{#With the above and other objects and features of m present invention in view, I shall now describe apreferred embodiment thereof on the lines'of the accompanying drawing in which l'showsa verticalsection through the pusher ram with its driving mechanism,

* Fig. '2 represents aside elevational view of the pushing ram, and

":Fi'g, 3 1's asectionalvi'ew of. a; modified form of thel n fi l qn "I'he pusher ram" [consists of a wide-flanged I-beam as, for instance, the German industrial standard 30. In such wide-flanged I-beams, the horizontal flanges 2 have a thickness of 20 mm., while the vertical web 3 has a thickness of only 12 mm. On one side of the vertical web 3, a spur rack 4 is fixed. The other side of the vertical web 3 is fitted with protection plates 5, preferably consisting of cast iron.

The spur rack 4 is geared to a pinion 6, which is seated for rotation in a horizontal plane around a vertical axis in a supporting frame I. The latter is equipped with a connecting arm 8 which serves as a support for the shaft bearing 9 above Above the bearing 9, a pinion H is provided, which is to be connected to a driving means therefor that is coupled to a driving motor (not shown).

In order to take up the counterpressure of the driving pinion on the pusher web 3, a wheel I2, arranged in a supporting seat I3, is provided at that side of the web 3, to which is fitted the protection plates 5. The wheel I2 is guided in the guide bearing M by means of a vertical shaft, the guide bearing l4 being connected at IS with the bearing l 0 of the connecting arm 8. The connection I5 is preferably adjustable so that with a. corresponding adjustment of the supporting seat I3, which is designed for adjustment accordingly, an adjustment of the wheel It may be attained to assure that the wheel I2 lies closely against the pusher web 3 even if some wear and tear may occur during the operation of the ram I. The pusher ram l i guided within the usual pushin machine by means of the lower carrying rolls l6 and the upperguide rolls H, in order to render a tilting movement of the "rain 4 towards the top of the machine impossible.

Instead of having the cast iron protection plates 5 and the counterpressure wheels I2 on one side of the vertical rod 3, another spur rack- 4a, which is geared to a toothed wheel 6a, may

be provided, whereby the pressure of thedriv-- ing pinion 6 is taken up, and a banding'of the is safely pusher web 3 in a lateral direction avoided.

I have now described my present invention the lines of a. preferred embodiment thereof,"butformed on one of said protection plates for mechanical reciprocation of the raminto and out of the coking chamber.

2. A pusher ram for coking chambers comprising, a steel beam having a vertical web portion and relatively thicker upper and lower transverse flange portions, a cast iron protection plate affixed to the web portion and substantially covering one of the web faces, and a toothed rack formed on said plate for mechanical reciprocation of the ram into and out of the coking chamber.

3. A pusher ram for coking chambers comprising, a metallic I-beam having a vertical web portion and relatively thicker upper and lower transverse flange portions, a toothed rack afiixed to one vertical face of the I-beam web portion for mechanical reciprocation of the ram into and out of the coking chamber, and a protection plate afllxed to and substantially covering the opposite face of the web portion.

4. Apparatus as claimed in claim 2 and which includes a pinion rotatably engaging the rack, a vertically disposed drive shaft for said pinion, a second vertically disposed shaft and a counterpressure wheel on said second shaft for engaging 5. Apparatus as claimed in claim 2 and which includes a pinion rotatably engaging the rack, a drive shaft for said pinion, a second shaft parallel to-said first shaft, a counterpressure wheel on said second shaft for engaging the opposite face of said ram from said pinion, a pair of fixed bearings for one end of said first and second shafts, a second pair of bearings for the other ends of said shafts, and an adjustable connection between said second bearings.

6. Apparatus as claimed in claim 2 and which includes a driven pinion rotatably meshing with the rack, and rotatable counterpressuremeans mounted for rotation alongside the opposite vertical side of the web portion, opposite the driven pinion, to exert counterpressure on the web portion. along its vertical side opposite the driven pinion.

v7. Apparatus as claimed in claim 1 and which includes a driven pinion rotatably meshing with the rack, and rotatable counterpressure means mounted for rotation alongside the protection plate opposite the driven pinion, to exert counterpressure on the web portion along its vertical side opposite the driven pinion.

8. A pusher ram for coking chambers comprising, a metallic beam having a vertical web portion and relatively thicker upper and lower transverse flange portions, protection plates afllxed to the web portion and substantially covering the opposite web faces, and a toothed rack formed on each of said protection plates for mechanical reciprocation of the ram into and out of the coking chambers.

HEINRICH KOPPERS. 

